Greatest Common Divisor (GCD) of 103 and 178
The greatest common divisor (GCD) of 103 and 178 is 1.
What is the Greatest Common Divisor (GCD)?
The GCD of two integers is the largest positive integer that divides both numbers without leaving a remainder. It is useful in simplifying fractions, finding common factors, and in number theory.
How to Calculate the GCD of 103 and 178?
We use the Euclidean algorithm, which involves the following steps:
- Divide the larger number by the smaller number.
- Replace the larger number with the smaller number and the smaller number with the remainder from the division.
- Repeat this process until the remainder is zero.
- The non-zero remainder just before zero is the GCD.
Step-by-Step Euclidean Algorithm
| Step | Calculation |
|---|---|
| 1 | 103 ÷ 178 = 0 remainder 103 |
| 2 | 178 ÷ 103 = 1 remainder 75 |
| 3 | 103 ÷ 75 = 1 remainder 28 |
| 4 | 75 ÷ 28 = 2 remainder 19 |
| 5 | 28 ÷ 19 = 1 remainder 9 |
| 6 | 19 ÷ 9 = 2 remainder 1 |
| 7 | 9 ÷ 1 = 9 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 187 and 125 | 1 |
| 197 and 45 | 1 |
| 46 and 49 | 1 |
| 91 and 91 | 91 |
| 71 and 21 | 1 |